Boiler-furnace.



- PATBNTBD 11313.25, 1908. s. s. SPIVBY.l BOILBR PURNAGB.

APPLICATION FILED JUNE 22,1906.

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No. 880,175. j P-ATENTED FEB. 25, 1908.

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APLIOTION FILE-D JUNE 22, 1906. l

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110.880,175. PATENTBD. PEB. z5, 1903.

S. S. SPIVBY. BOILER PURNAUE.

APIPLICATION FILED JUNE 22,1906.

3 SHEETS--SHEET 3.

UNITED STATES PATENT OFFICE.

BOILER-FURNACE.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed June 22 1906. Serial No. 322.931 l To all whom it may; Concern.'

Be it known that I, SAMUEL S. SrivnY, a citizen of the United States, residing at Paducah, in the county of McCracken and State of Kentucky, have invented certain new and useful Improvements in Boiler-Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to new and useful improvements in furnaces and more particularly to that class adapted to be used inconnection with boilers for generating steam, etc., and my object is to so construct the furnace that the smoke will be consumed and the cold air thoroughly heated before coming i in contact with the fliies of the boiler.

A further object is to provide means for injecting steam into the fire box whereby when extremely dry fuel is being used such as wood, shavings or the like which have no moisture and thereby supplying the fuel with the proper amount of hydrogen.

A still further object is to provide means for reconveying the smoke and air through the combustion chamber whereby the air will be thoroughly heated and the smoke consumed.

Other objects and advantages will be here inafter referred to and more particularly pointed out in the claims.

In the accompanying drawings which are made a part of this application, Figure 1 is a longitudinal vertical sectional view through the furnace showing a boiler in place thereon. Fig. 2 is a horizontal sectional view through the furnace. Fig. 3 is a vertical sectional view as seen from line 3 3 Fig. 1, and, Fig. 4 is a similar view as seen from line 4 4 Fig. 1

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, 1 indicates the outer walls of my improved furnace between which is located a boiler 2, said v boiler being of the usual or any preferred form. At one end of the Walls 1 is disposed a fire box 3, in which is located the usual form of grate bars 4; extending rearwardly from the fire box 3 is a bridge wall 5, said wall being tapered downwardly at its rear end for a purpose which will hereinafter be set forth. At the rear of the bridge Wall and at a distance therefrom is a partition 6, said parti-` tion having a plurality of openings 7 near its upper end for the passage of the hot air from the fire box, the space between the partition 6 and the end of the bridge wall 5 forming a chamber 8 into which the smoke and partially heated air from the fire box is directed, the fioor 9 of the chamber 3 being semicircular whereby the smoke directed thereinto will be deflected into calorific iiues 10, said flues extending through the bridge wall. and the free ends 11 thereof directed through the combustion chamber, the extreme outer end of the fiues being provided with elbows 12 so that the air and smoke passing through said iiues will be directed towards the rear end of the furnace.

An auxiliary partition 13 is disposed in the rear of the partition 6 and at a distance therefrom, thereby providing an auxiliary combustion chamber 14 between the two walls, the auxiliary partition being provided with a plurality of ports 15 and 16, said ports being disposed below the plane of the openings 7 in the partition 6, thereby forming a check to the passage of the heat through the auxiliary chamber.

In operation fuel such as coal or the like is deposited in the fire box or combustion chamber 3 and below the free ends 11 `of the calo; riiic flues 10, so that said free ends will be heated to a high degree. After a certain temperature has been reached the hot air arises to the top of the furnace and travels as shown by the arrows 17 in Fig. 1 of the drawings and it will be clearly understood that the cold air entering the furnace through the fire box or otherwise as indicated by the arrows 18 in Fig. 1, will be confined to the lower strata of the furnace and directed over the surface of the bridge wall 5 and into the chamber 8, the bridge wall'5 being so tapered that the current of air will strike the partition 6 below the openings 7 and be deflected into the chamber 3, the air thus directed being surcharged with the smoke arising from the fuel. lVhen the air has reached the semicircular floor 9 of the chamber 8, it is directed into the calorific flues 10 and is conveyedto the opposite end 'thereof where it is thoroughly heated and the smoke practically consumed so that when the air escapes through the ends of the elbows it is heated to a very high degree and will immediately rise to the upper portion of the furnace and will pass rearwardly through the openings 7 into the auxiliary combustion chamber 14 where any smoke not consumed while assing through the caloriiic flues will be t oroughly con- 'sumed before passing through the ports in the auxiliary partition 13. l

When fuel such as wood, shavings, sawdust or the like is used, I have provided means for directing steamv through the fire box to produce hydrogen thereby increasing the Combustible qualities of the fuel and to accom lish this result I direct a pipe 19 horizontallpy through the chamber 8 and at points in line with the flues 10 I provide stems 20, said stems being directed into the open ends of the fluesy so that steam passing through said stems will be directed into the flues.

Extending from one end of the pipe 19 to the dome 21 of the boiler is a pipe 22 by which means the steam is conveyed from the boiler to the pipe 19. It willv also be seen that when steam is being injected into the llues 10 that the draught therethrough will be increased. It will thus be seen that by directing the cold air through the calorific flues and through the heated portion thereof, that when the air reaches the flues 23 of the boiler it will have been thoroughly heated and the danger of injuring the flues by coming in contact with cold air obviated;

What I claim is: V

A furnace comprising side and end walls, a combustion chamber at one end thereof, a rearwardly and downwardly inclined bridge wall, a partition to the rear of the bridge wall with passages at its upper end, a curved bottom to the chamber formed between said partition and therear end of the bridge wall,

flues leading from near the bottom of said chamber to the front of the combustion chamber and having curved ends directed toward each other, an auxiliary partition to the rear of said first-named partition and having openings below those of the front partition, and a ipe leading from the steam space of the boilper to direct steam into the ends of said flues in said chamber. v h

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL S. SPIVEY.

Witnesses:

ED. CLARK, F. A. RANKIN. 

